[PS-589] Fix emergency contact takeover device verification and endpoints for its settings (#2016)

* Added UnknownDeviceVerificationEnabled on User that is turned off when emergency contact takes over the account. Also added endpoints to get and update 2fa device verification settings. And Updated migrations & tests

* Applied dotnet format

* Fixed method rename call on TwoFactorController

* PS-589 Format fixes

* PS-589 changed UnknownDeviceVerificationEnabled to be non-nullable

src/Core/Entities/User.cs

@@ -62,6 +62,7 @@ namespace Bit.Core.Entities
         public bool UsesKeyConnector { get; set; }
         public int FailedLoginCount { get; set; }
         public DateTime? LastFailedLoginDate { get; set; }
+        public bool UnknownDeviceVerificationEnabled { get; set; }
 
         public void SetNewId()
         {